# encoding: utf-8

module Nimbu
  module Pagination
    # A module that adds http get request to response pagination
    module PagedRequest
      include Nimbu::Utils::Constants

      FIRST_PAGE = 1 # Default request page if none provided

      PER_PAGE   = 30 # Default number of items as specified by API

      NOT_FOUND  = -1 # Either page or per_page parameter not present

      # Check if current api instance has default per_page param set,
      # otherwise use global default.
      #
      def default_page_size
        current_api.per_page ? current_api.per_page : PER_PAGE
      end

      def default_page
        current_api.page ? current_api.page : FIRST_PAGE
      end

      # Perform http get request with paginatoin parameters
      #
      def page_request(path, params={})
        if params[PARAM_PER_PAGE] == NOT_FOUND
          params[PARAM_PER_PAGE] = default_page_size
        end
        if params[PARAM_PAGE] && params[PARAM_PAGE] == NOT_FOUND
          params[PARAM_PAGE] = default_page
        end

        current_api.get_request(path, params)
      end

    end # PagedRequest
  end # Pagination
end # Nimbu
